When speaking about oneself, should Konjunktiv I or Indikativ be used?

Question

I was reading about the use of Konjunktiv I, and read that it is really only used by reporters.

However, this got me thinking, if I were a reporter, and I were talking about something I said, would I still use Konjunktiv I?

For example, if I were to say the following, I know it's true:

Ich sagte, ich sei müde.

Would I say that, or should I have said:

Ich sagte, ich bin müde.

Answer 1

The first variant given by you,

Ich sagte, ich sei müde.

sounds a bit stilted but is technically correct.

In spoken language, more typically you would say

Ich sagte: "Ich bin müde".

or some other variant such as

Ich war müde und sagte das auch.

By the way, back when IBM sold personal computers, can you guess how Germans would resolve the acronym IBM?